Set prices button from the variations notice is not updating the right amount of variations (#40876)

* Improve has_price filter so it can matches when the price record does not exist or it's empty/null

* Get the exact variation ids of those ones that do not have price

* Add changelog files

* Fix linter errors

packages/js/product-editor/changelog/fix-40875

@@ -0,0 +1,4 @@
+Significance: patch
+Type: fix
+
+Get the exact variation ids of those ones that do not have price

packages/js/product-editor/src/blocks/product-fields/variation-items/edit.tsx

@@ -124,8 +124,11 @@ export function Edit( {
 			EXPERIMENTAL_PRODUCT_VARIATIONS_STORE_NAME
 		).getProductVariations< Pick< ProductVariation, 'id' >[] >( {
 			product_id: productId,
+			order: 'asc',
+			orderby: 'menu_order',
 			has_price: false,
 			_fields: [ 'id' ],
+			per_page: totalCountWithoutPrice,
 		} );
 		handlePrompt( {
 			onOk( value ) {
@@ -187,8 +190,8 @@ export function Edit( {
 							update &&
 							update.find(
 								( variation ) =>
-									variation.regular_price ||
+									'regular_price' in variation ||
-									variation.sale_price
+									'sale_price' in variation
 							) )
 					) {
 						invalidateResolution(

plugins/woocommerce/changelog/fix-40875

@@ -0,0 +1,4 @@
+Significance: patch
+Type: fix
+
+Improve has_price filter so it can matches when the price record does not exist or it's empty/null

plugins/woocommerce/includes/rest-api/Controllers/Version3/class-wc-rest-product-variations-controller.php

@@ -906,13 +906,39 @@ class WC_REST_Product_Variations_Controller extends WC_REST_Product_Variations_V
 
 		// Price filter.
 		if ( is_bool( $request['has_price'] ) ) {
-			$args['meta_query'] = $this->add_meta_query( // WPCS: slow query ok.
+			if ( $request['has_price'] ) {
-				$args,
+				$args['meta_query'] = $this->add_meta_query( // phpcs:ignore Standard.Category.SniffName.ErrorCode slow query ok.
-				array(
+					$args,
-					'key'     => '_price',
+					array(
-					'compare' => $request['has_price'] ? 'EXISTS' : 'NOT EXISTS',
+						'relation' => 'AND',
-				)
+						array(
-			);
+							'key'     => '_price',
+							'compare' => 'EXISTS',
+						),
+						array(
+							'key'     => '_price',
+							'compare' => '!=',
+							'value'   => null,
+						),
+					)
+				);
+			} else {
+				$args['meta_query'] = $this->add_meta_query( // phpcs:ignore Standard.Category.SniffName.ErrorCode slow query ok.
+					$args,
+					array(
+						'relation' => 'OR',
+						array(
+							'key'     => '_price',
+							'compare' => 'NOT EXISTS',
+						),
+						array(
+							'key'     => '_price',
+							'compare' => '=',
+							'value'   => null,
+						),
+					)
+				);
+			}
 		}
 
 		// Filter product based on stock_status.